Question

Use the five steps for problem solving to answer the following question. Please show all of your work.

Ace Appliances charges a $45 fee plus $75 per hour for servicing refrigerators. Appliance Assessors charges a $60 fee plus $65 per hour. How many repair hours would make Appliance Assessors less expensive than Ace Appliances?

Answer 1

for Ace appliances you have
y=45+75x
and for Appliance Assessors you have
z=60+65x
in both cases x means hours
you just have to evaluate both equations for x=1, then x =2, .... until z becomes less than y

Answer 2

Using the above analogy we get z<y for x>=3